1028070689 has 4 divisors (see below), whose sum is σ = 1032372480. Its totient is φ = 1023768900.

The previous prime is 1028070683. The next prime is 1028070731. The reversal of 1028070689 is 9860708201.

1028070689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9860708201 = 3221 ⋅3061381.

It is a cyclic number.

It is not a de Polignac number, because 1028070689 - 2²⁴ = 1011293473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1028070683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150537 + ... + 2151014.

It is an arithmetic number, because the mean of its divisors is an integer number (258093120).

Almost surely, 2^1028070689 is an apocalyptic number.

It is an amenable number.

1028070689 is a deficient number, since it is larger than the sum of its proper divisors (4301791).

1028070689 is an equidigital number, since it uses as much as digits as its factorization.

1028070689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301790.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1028070689 is about 32063.5414294803. The cubic root of 1028070689 is about 1009.2706851388.

The spelling of 1028070689 in words is "one billion, twenty-eight million, seventy thousand, six hundred eighty-nine".